I sent Ragnar some LED's and instructions and resistors, but he didn't use them as far as I know and may still have them.

Anyway....

Here's a site and here's a little program that will let you figger out the resistors you need.

http://www.misty.com/people/don/ledx.html

http://www.rattlebars.com/voapix/LED.exe

You can't exceed more than 80% of your source voltage on one resistor LED series/set. Meaning that if you have 2.4 volt LED's and you are running 14 Volts off your alternator, you can only run 4 LED's in a series. If you want more, you gotta parallel them (there are other ways too). Note: if you wire them incorrectly, they can draw one heck of a lot of current.

Now for the funny stuff! NONE of the figures used by the formula nor the figures in the program which I have written WORK properly for super bright LED's. For best results, experiment with your LED's in a series and test with the lowest OHM resistor you can use with it. You can get them really bright by going WAY under what the formula calls for (I'm using 28 OHMs where 150 is called for super brightness).

I have replaced all of my "bullet" lights with LED's and they actually PROJECT a circle of red light onto concrete walls & such.

Here's a source for LED's right near you (sorta)..

http://www.hosfelt.com/